Kaa-Khemsky District (also Kaa-Khemskiy) (Russian: Каа́-Хе́мский кожуун; Tuvan: Каа-Хем кожуун, Kaa-Xem kojuun) is an administrative and municipal district (raion, or kozhuun), one of the seventeen in the Tuva Republic, Russia. It is located in the center and east of the republic. The area of the district is 25,726.04 square kilometers (9,932.88 sq mi). Its administrative center is the rural locality (a selo) of Saryg-Sep. Population: 12,279 (2010 Russian census); 13,071 (2002 Census); 14,982 (1989 Soviet census). The population of Saryg-Sep accounts for 36.0% of the district's total population.